
The Boeing 787's composite materials, wire rebar for structural integrity, and copper mesh embedded in the carbon fiber composite can create a Faraday cage effect, which interferes with cell reception. Additionally, the electrically controlled windows with transparent electrodes may also contribute to poor cell reception.

Boeing 787 planes are known to block cell signals more often due to a combination of factors. The composite materials used in the aircraft's construction, along with a wire rebar for structural integrity, may interfere with cellular signals. Additionally, the copper mesh embedded in the carbon fiber composite could create a Faraday cage, which further blocks signals. The electrically controlled windows with transparent electrodes may also contribute to the poor cell reception.

The copper mesh in the Boeing 787 can affect cell signals due to the Faraday cage effect. The mesh creates a conductive barrier that can block or weaken electromagnetic fields, such as those from cell phone signals. This occurs because the mesh causes the signal to be diverted into the metal structure of the aircraft rather than passing through the fuselage. The inconsistency in signal strength may be due to factors such as proximity to open doors or windows during boarding.